A new study found that the survival of neurons is intrinsically programmed at neural birth to decrease cell death. It was previously thought that neuron survival is dictated by external forces.

Researchers discovered two key paths that cells travel during aging, as well as a new way to genetically program these paths to extend lifespan using a computer simulation.

Modifying 12 factors could prevent 40% of dementia cases, including excessive alcohol intake, air pollution exposure, hypertension, obesity, smoking, social isolation, physical inactivity, and diabetes.  

In a review of 60 studies, overweight or obese men were found to have low semen quality, including low semen volume, sperm count and concentration, sperm vitality, total motility, and normal morphology.